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PDF STA308 Data sheet ( Hoja de datos )
| Número de pieza | STA308 | |
| Descripción | MULTICHANNEL DIGITAL AUDIO PROCESSOR | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de STA308 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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STA308
MULTICHANNEL DIGITAL AUDIO PROCESSOR WITH DDX™
8 DDXTM Channels Capability (24 bit)
From 32kHz to 192kHz Input Sample Rates
Supported
Volume Control from 0 to -127 dB (0.5 dB steps)
Variable Digital Gain from 0 to 24dB (0.5dB
steps) with Digital Limiter Functionality and
TQFP64
Variable Attack and Release Time
ORDERING NUMBER: STA308
I2S Inputs and Outputs
Individual Channel and Master Gain/
t(s)Attenuation
Individual Channel Mute and Zero Input Detect
ucAuto-Mute
d Selectable Serial Audio Data Interface
ro Bass/Treble Controls
P Channel Mapping of any Input to any
teProcessing/DDXTM Channel
le Active Crossover Capability
so DC Blocking Selectable High-Pass Filter
b Selectable Bass Management on Channel 6
O Selectable Adjacent Channel Mixing Capability
) - Selectable DDXTM Headphone Output on
t(sChannels 7 & 8
c Selectable Clock Input Ratio
du Selectable De-emphasis
ro Selectable DDXTM Ternary, or Binary PWM
Poutput
te AM Interference Reduction Mode
Obsole I2C Control
DESCRIPTION
The STA308 is a single chip solution for digital audio
processing and control in multi-channel applications.
It provides output capabilities for DDXTM (Direct Digi-
tal Amplification). In conjunction with a DDXTM power
device, it provides high-quality, high-efficiency, all
digital amplification. The device is extremely versatile
allowing for input of most digital formats including 6.1
channel and 192kHz, 24-bit DVD-Audio.
The internal 24-bit DSP allows for high resolution
processing at all standard input sample frequencies.
Processing includes volume control, filtering, bass
management, gain compression/limiting and PCM
and DDXTM outputs. Filtering includes five user-pro-
grammable 28-bit biquads for EQ per channel, as
well as bass, treble and DC blocking. External clock-
ing can be provided at 4 different ratios of the input
sample frequency. All sample frequencies are up-
sampled for processing. Each internal processing
channel can receive any input channel, allowing flex-
ibility and the ability to perform active digital cross-
over for powered loudspeaker systems.
The serial audio data interface accepts many differ-
ent formats, including the popular I2S format. Eight
channels of DDX processing are performed.
April 2010
1/33
1 page  
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VDD_3.3 3.3V I/O Power Supply
VDD_2.5 2.5V Logic Power Supply
Vi Voltage on input pins
Vo Voltage on output pins
Tstg Storage Temperature
Tamb Ambient Operating Temperature
STA308
Value
-0.5 to 4
-0.5 to 3.3
-0.5 to (VDD+0.5)
-0.5 to (VDD+0.3)
-40 to +150
-20 to +85
Unit
V
V
V
V
°C
°C
THERMAL DATA
Symbol
t(s)Rthj-amb
Parameter
Thermal resistance Junction to Ambient
ProducRECOMMENDED DC OPERATING CONDITIONS
teSymbol
Parameter
leVDD_3.3 I/O Power Supply
soVDD_2.5 Logic Power Supply
Obsolete Product(s) - ObTj Operating Junction Temperature
Value
85
Unit
°C/W
Value
3.0 to 3.6
2.3 to 2.7
-20 to +125
Unit
V
V
°C
5/33
5 Page 
STA308
3.0 CONFIGURATION REGISTER A (ADDRESS 00H)
BIT D7 D6 D5 D4
NAME
MPC
HPE
BME
IR1
RST 1 0 0 0
D3
IR0
0
D2
MCS2
0
D1
MCS1
1
D0
MCS0
1
3.0.1 Master Clock Select
BIT R/W RST
0 R/W
1
1 R/W
1
2 R/W
0
NAME
MCS0
MCS1
MCS2
DESCRIPTION
Master Clock Select : Selects the ratio between the input I2S
sample frequency and the input clock.
The STA308 will support sample rates of 32kHz, 44.1kHz, 48Khz, 88.2kHz, 96kHz, 176.4kHz, and 192kHz.
Therefore the internal clock will be:
– 65.536Mhz for 32kHz
– 90.3168Mhz for 44.1khz, 88.2kHz, and 176.4kHz
)– 98.304Mhz for 48kHz, 96kHz, and 192kHz
t(sThe external clock frequency provided to the XTI pin must be a multiple of the input sample frequency(fs). The
crelationship between the input clock and the input sample rate is determined by both the MCSx and the IRx (In-
uput Rate) register bits. The MCSx bits determine the PLL factor generating the internal clock and the IRx bits
ddetermine the oversampling ratio used internally.
roInput Sample Rate
Pfs (kHz)
IR
MCS(2..0)
te1xx 011 010 001 000
le32, 44.1, 48
00 128fs
256fs
384fs
512fs
768fs
so88.2, 96
01 64fs
128fs
192fs
256fs
384fs
b176.4, 192
10 64fs
128fs
192fs
256fs
384fs
- O3.0.2 Interpolation Ratio Select
t(s)BIT R/W RST NAME
DESCRIPTION
3 R/W
uc4 R/W
0
0
IR0 Interpolation Ratio Select : Selects internal interpolation ratio based on input I2S
IR1 sample frequency
rodThe STA308 has variable interpolation (oversampling) settings such that internal processing and DDX output
rates remain consistent. The first processing block interpolates by either 4 times, 2 times, or 1 time (pass-
Pthrough). The IR bits determine the oversampling ratio of this interpolation.
leteTable 2. IR bit settings as a function of Input Sample Rate.
soInput Sample Rate Fs
IR(1,0)
1st Stage Interpolation Ratio
Ob 32kHz
00
4 times oversampling
44.1kHz
00
4 times oversampling
48kHz
00
4 times oversampling
88.2kHz
01
2 times oversampling
96kHz
01
2 times oversampling
176.4kHz
10
Pass-Through
192kHz
10
Pass-Through
11/33
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet STA308.PDF ] | |
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